Utility knife



FIG. 1 is a perspective view of a utility knife showing the new design;

FIG. 2 is a front view of the utility knife;

FIG. 3 is a rear view of the utility knife;

FIG. 4 is a top view of the utility knife;

FIG. 5 is a bottom view of the utility knife;

FIG. 6 is a left side view of the utility knife; and,

FIG. 7 is a right side view of the utility knife. 

CLAIM The ornamental design for a utility knife, as shown and described. 